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The remediation of Cd- contaminated alkaline soil plays a critical role in safe wheat production. In this study, hydroxyapatite (HAP), a functional environmental remediation material, was selected to investigate the effects of HAP on cadmium accumulation in winter wheat (Triticum aestivum L.), Cd bioavailability in alkaline soil moderately polluted with Cd (2.46 mg kg-1) and the soil bacterial community via pot experiments. The results showed HAP effectively inhibited Cd accumulation in the grains of two investigated wheat cultivars by hindering root uptake. The Cd concentrations decreased by 49.9-81.9%, and 35.7-92.4% in the grains of Zhoumai-30 and Zhengmai-7698, respectively. HAP increased the soil pH and reduced the bioavailability of Cd. 16 S rRNA sequencing analysis indicated that the changes of soil physicochemical properties changed the diversity and composition of the bacterial community by increasing the relative abundance of beneficial soil bacteria. These results demonstrated the application of 2.5% HAP combined with planting Zhengmai-7698 treatment was a potential remediation method for safe wheat production, and also benefited soil P and N cycling by increasing relative abundance of beneficial bacteria. The good performance of HAP in inhabiting Cd accumulation in wheat grains indicated it is a promising material for safe wheat production.
Ya Feng; Jianjun Yang; Wei Liu; Yubo Yan; Yihao Wang. Hydroxyapatite as a passivator for safe wheat production and its impacts on soil microbial communities in a Cd-contaminated alkaline soil. Journal of Hazardous Materials 2020, 404, 124005 .
AMA StyleYa Feng, Jianjun Yang, Wei Liu, Yubo Yan, Yihao Wang. Hydroxyapatite as a passivator for safe wheat production and its impacts on soil microbial communities in a Cd-contaminated alkaline soil. Journal of Hazardous Materials. 2020; 404 ():124005.
Chicago/Turabian StyleYa Feng; Jianjun Yang; Wei Liu; Yubo Yan; Yihao Wang. 2020. "Hydroxyapatite as a passivator for safe wheat production and its impacts on soil microbial communities in a Cd-contaminated alkaline soil." Journal of Hazardous Materials 404, no. : 124005.
There is growing concern that Cd in soils can be transferred to plants, resulting in phytotoxicity and threats to human health via the food chain. Biochar has been reported to be a soil amendment capable of reducing the bioavailability of metals in soil by electrostatic interactions, ionic exchange and the specific binding of metal ions by surface ligands. To determine the effects of Cd contamination and nanobiochar on the growth characteristics of plants, the dynamics of Cd in soil were explored in Petri dish and pot experiments (0%, 0.2%, 0.5% and 1% nanobiochar), respectively. The diversity, distribution and composition of the bacterial community in treated soil were monitored by high-throughput sequencing. The results showed that the germination potential and height and weight of plants were significantly decreased in Cd-treated soil samples (P < 0.05). The Cd content of Brassica chinensis L. in the treated soil groups was lower than that in the untreated soil groups (P < 0.05) after nanobiochar application. The application of biochar significantly improved the microbial biomass, microorganism abundance and diversity of Actinobacteria and Bacteroidetes in Cd-contaminated soil and reduced the diversity of Proteobacteria, which was relatively more persistent than in the contaminated sites without biochar application. The results of this study provide theoretical and technical support for understanding the environmental behavior of nanopassivators, thus enhancing the role of biochar in the remediation of soil pollution.
Wei Liu; Yulong Li; Ya Feng; Jianchen Qiao; Huiwei Zhao; Jixing Xie; Yanyan Fang; Shigang Shen; Shuxuan Liang. The effectiveness of nanobiochar for reducing phytotoxicity and improving soil remediation in cadmium-contaminated soil. Scientific Reports 2020, 10, 1 -10.
AMA StyleWei Liu, Yulong Li, Ya Feng, Jianchen Qiao, Huiwei Zhao, Jixing Xie, Yanyan Fang, Shigang Shen, Shuxuan Liang. The effectiveness of nanobiochar for reducing phytotoxicity and improving soil remediation in cadmium-contaminated soil. Scientific Reports. 2020; 10 (1):1-10.
Chicago/Turabian StyleWei Liu; Yulong Li; Ya Feng; Jianchen Qiao; Huiwei Zhao; Jixing Xie; Yanyan Fang; Shigang Shen; Shuxuan Liang. 2020. "The effectiveness of nanobiochar for reducing phytotoxicity and improving soil remediation in cadmium-contaminated soil." Scientific Reports 10, no. 1: 1-10.
The immobilization effect and mechanism of nano-hydroxyapatite(NHAP) on Pb in the ryegrass rhizosphere soil were studied by root-bag experiment. The speciation analysis results revealed that the residual Pb concentrations in the rhizosphere soil significantly increased after NHAP application. The acid-soluble and reducible Pb concentrations significantly decreased, indicating that NHAP had obviously immobilized Pb. Meanwhile, NHAP significantly promoted the secretion of tartaric acid from ryegrass roots, resulting the rhizosphere soil pH had been below that of the control group. This helped to relieve the stress of Pb on ryegrass, also promoted the dissolution of NHAP, resulting the formation of stable precipitation with more Pb ions. NHAP increased the rhizosphere soil pH by 0.03 to 0.17, which promoted the conversion of Pb to non-utilizable bioavailability. The total Pb mass balance indicated only a very small proportion Pb transferred to the shoots through ryegrass roots. The formation of pyromorphite by Pband NHAP in soil was accordingly to interpret the dominant mechanism for Pb immobilization.
Shu-Xuan Liang; Xiaocan Xi; Ling Ding; Qiusheng Chen; Wei Liu. Immobilization Mechanism of Nano-Hydroxyapatite on Lead in the Ryegrass Rhizosphere Soil Under Root Confinement. Bulletin of Environmental Contamination and Toxicology 2019, 103, 330 -335.
AMA StyleShu-Xuan Liang, Xiaocan Xi, Ling Ding, Qiusheng Chen, Wei Liu. Immobilization Mechanism of Nano-Hydroxyapatite on Lead in the Ryegrass Rhizosphere Soil Under Root Confinement. Bulletin of Environmental Contamination and Toxicology. 2019; 103 (2):330-335.
Chicago/Turabian StyleShu-Xuan Liang; Xiaocan Xi; Ling Ding; Qiusheng Chen; Wei Liu. 2019. "Immobilization Mechanism of Nano-Hydroxyapatite on Lead in the Ryegrass Rhizosphere Soil Under Root Confinement." Bulletin of Environmental Contamination and Toxicology 103, no. 2: 330-335.
Lead is recognized as one of the most widespread toxic metal contaminants and pervasive environmental health concerns in the environment. In this paper, the effects of nano-hydroxyapatite (NHAP) on remediation in artificially Pb-contaminated soils and ryegrass were studied in a pot experiment. The addition of NHAP decreased the water- and acid-soluble, exchangeable, and reducible fractions of Pb, extracted using the Community Bureau of Reference (BCR) method, whilst greatly increasing the residual fraction of Pb. Oxidizable Pb was increased slightly. No significant increase in soil pH was caused by the application of NHAP. Compared to conditions without NHAP, the addition of NHAP decreased the Pb content in ryegrass shoots and roots by 13.19–20.3% and 2.86–21.1%, respectively. Therefore, the application of NHAP reduced the mobility and bioavailability of Pb in the soil. In addition, the application of NHAP improved the fresh weight of shoots and roots, and promoted the growth of ryegrass. NHAP played a positive role in stimulating ryegrass to secrete tartaric acid.
Ling Ding; Jianbing Li; Wei Liu; Qingqing Zuo; Shu-Xuan Liang. Influence of Nano-Hydroxyapatite on the Metal Bioavailability, Plant Metal Accumulation and Root Exudates of Ryegrass for Phytoremediation in Lead-Polluted Soil. International Journal of Environmental Research and Public Health 2017, 14, 532 .
AMA StyleLing Ding, Jianbing Li, Wei Liu, Qingqing Zuo, Shu-Xuan Liang. Influence of Nano-Hydroxyapatite on the Metal Bioavailability, Plant Metal Accumulation and Root Exudates of Ryegrass for Phytoremediation in Lead-Polluted Soil. International Journal of Environmental Research and Public Health. 2017; 14 (5):532.
Chicago/Turabian StyleLing Ding; Jianbing Li; Wei Liu; Qingqing Zuo; Shu-Xuan Liang. 2017. "Influence of Nano-Hydroxyapatite on the Metal Bioavailability, Plant Metal Accumulation and Root Exudates of Ryegrass for Phytoremediation in Lead-Polluted Soil." International Journal of Environmental Research and Public Health 14, no. 5: 532.
The crude recycling activities for e-waste have led to the severe and complex contamination of e-waste workshop topsoil (0–10 cm) by heavy metals.
Liu Wei; Shutao Wang; Qingqing Zuo; Shuxuan Liang; Shigang Shen; Chunxia Zhao. Nano-hydroxyapatite alleviates the detrimental effects of heavy metals on plant growth and soil microbes in e-waste-contaminated soil. Environmental Science: Processes & Impacts 2016, 18, 760 -767.
AMA StyleLiu Wei, Shutao Wang, Qingqing Zuo, Shuxuan Liang, Shigang Shen, Chunxia Zhao. Nano-hydroxyapatite alleviates the detrimental effects of heavy metals on plant growth and soil microbes in e-waste-contaminated soil. Environmental Science: Processes & Impacts. 2016; 18 (6):760-767.
Chicago/Turabian StyleLiu Wei; Shutao Wang; Qingqing Zuo; Shuxuan Liang; Shigang Shen; Chunxia Zhao. 2016. "Nano-hydroxyapatite alleviates the detrimental effects of heavy metals on plant growth and soil microbes in e-waste-contaminated soil." Environmental Science: Processes & Impacts 18, no. 6: 760-767.
Biochar can be used to reduce the bioavailability and leachability of heavy metals, as well as organic pollutants in soils through adsorption and other physicochemical reactions. The objective of the study was to determine the response of microbial communities to biochar amendment and its influence on heavy metal mobility and PCBs (PCB52, 44, 101, 149, 118, 153, 138, 180, 170, and 194) concentration in application of biochar as soil amendment. A pot (macrocosm) incubation experiment was carried out with different biochar amendment (0, 3, and 6 % w/w) for 112 days. The CaCl2-extractable concentration of metals, microbial activities, and bacterial community were evaluated during the incubation period. The concentrations of 0.01 M CaCl2-extractable metals decreased (p > 0.05) by 12.7 and 20.5 % for Cu, 5.0 and 15.6 % for Zn, 0.2 and 0.5 % for Pb, and 1.1 and 8.9 % for Cd, in the presence of 3 and 6 % of biochar, respectively, following 1 day of incubation. Meanwhile, the total PCB concentrations decreased from 1.23 mg kg−1 at 1 day to 0.24 mg kg−1 at 112 days after 6 % biochar addition, representing a more than 60 % decrease relative to untreated soil. It was also found out that biochar addition increased the biological activities of catalase, phosphatase, and urease activity as compared with the controls at the same time point. Importantly, the Shannon diversity index of bacteria in control soils was 3.41, whereas it was 3.69 and 3.88 in soils treated with 3 and 6 % biochar soil. In particular, an increase in the number of populations with the putative ability to absorb PCB was noted in the biochar-amended soils. The application of biochar to contaminated soils decreased the concentrations of heavy metals and PCBs. Application of biochar stimulated Proteobacteria and Bacteroides, which may function to absorb soil PCB and alleviate their toxicity.
Wei Liu; Shutao Wang; Peng Lin; Hanwen Sun; Juan Hou; Qingqing Zuo; Rong Huo. Response of CaCl2-extractable heavy metals, polychlorinated biphenyls, and microbial communities to biochar amendment in naturally contaminated soils. Journal of Soils and Sediments 2015, 16, 476 -485.
AMA StyleWei Liu, Shutao Wang, Peng Lin, Hanwen Sun, Juan Hou, Qingqing Zuo, Rong Huo. Response of CaCl2-extractable heavy metals, polychlorinated biphenyls, and microbial communities to biochar amendment in naturally contaminated soils. Journal of Soils and Sediments. 2015; 16 (2):476-485.
Chicago/Turabian StyleWei Liu; Shutao Wang; Peng Lin; Hanwen Sun; Juan Hou; Qingqing Zuo; Rong Huo. 2015. "Response of CaCl2-extractable heavy metals, polychlorinated biphenyls, and microbial communities to biochar amendment in naturally contaminated soils." Journal of Soils and Sediments 16, no. 2: 476-485.
A batch composting study was performed to evaluate effects of biochar addition on dynamics of microbial community and changes of key physic-chemical properties during composting of tomato stalk and chicken manure. As a comparison, two amendments of peat bog and zeolite were selected. The results indicated that biochar addition for composting showed a shorter time to enter thermophilic phase (3 d) and a higher temperature (56°C) and longer duration of thermophilic phase compared to that of peat bog addition, zeolite addition and raw composts. The highest C/N ratio and volatile fatty acids' concentration with biochar addition were obtained. Biochar addition also showed more influence on bacterial community changes than that of peat bog and zeolite. Thus, biochar addition could significantly affect physic-chemical process and microbial community diversity on tomato stalk and chicken manure composting. This study provides valuable information for improving composting and a better understanding of biodegradation processes.
Liu Wei; Wang Shutao; Zhang Jin; Xu Tong. Biochar influences the microbial community structure during tomato stalk composting with chicken manure. Bioresource Technology 2014, 154, 148 -154.
AMA StyleLiu Wei, Wang Shutao, Zhang Jin, Xu Tong. Biochar influences the microbial community structure during tomato stalk composting with chicken manure. Bioresource Technology. 2014; 154 ():148-154.
Chicago/Turabian StyleLiu Wei; Wang Shutao; Zhang Jin; Xu Tong. 2014. "Biochar influences the microbial community structure during tomato stalk composting with chicken manure." Bioresource Technology 154, no. : 148-154.